核心筒墙与装配式梁平面内连接点抗震性能研究

发布时间：2018-06-12 16:33

本文选题：住宅产业化 + 装配式结构　；参考：《沈阳建筑大学》2015年硕士论文

【摘要】：随着住宅产业化在我国的不断发展,装配式结构将成为未来建筑发展的主体,而其中兼具装配式框架结构和装配式剪力墙结构优点的装配式框架剪力墙结构将具有广阔的应用前景,装配式框架核心筒结构作为装配式框架剪力墙结构的一种形式在未来的高层住宅建设中也将受到广泛的应用。那么有关装配式框架核心筒结构体系的构件之间连接节点抗震性能的研究就显得至关重要。目前,装配式结构都是按现浇结构设计并通过拆分组合而成的,装配式结构的整体性能和抗震性能是由其构件之间连接的性能决定的,而其构件之间连接的性能是否能达到与现浇结构相同还没有相关试验证实,因此研究装配式构件之间的连接性能对促进装配式结构的发展具有重要意义。本文用两种方法制作了两个剪力墙与装配式梁平面内连接点的试件并制作了一个现浇节点作为对比,对3个试件进行低周往复加载试验,通过试验现象和试验数据分析各试件在加载过程中的裂缝发展情况,破坏特征,开裂荷载,屈服荷载,极限荷载,荷载-位移滞回曲线,骨架曲线,刚度退化曲线等,对比分析装配式试件与现浇试件的承载力,延性、刚度及耗能能力等。通过试验结果分析得出：从试验现象看,装配式试件的开裂,屈服,破坏过程与现浇试件基本相同,均在梁根部发生弯曲破坏；在承载力方面,装配式试件的各阶段承载力略小于现浇试件,而两个装配式试件的各阶段承载力比较接近；观察各试件的刚度退化曲线得出：装配式试件刚度退化曲线的变化趋势与现浇试件相同,但刚度略小于现浇试件,两个装配式试件在加载过程中的刚度退化情况基本相同；在延性方面,装配式试件的位移延性系数均小于现浇试件,但相差均不超过11%,装配式试件的延性接近于现浇试件,两个装配式试件的位移延性系数基本相同,说明延性相当；在耗能能力方面,通过现浇带连接的装配式试件的耗能能力强于现浇试件,而通过高强砂浆灌缝连接的装配式试件与现浇试件的耗能能力接近。本文还运用有限元分析软件ABAQUS对现浇试件和一个装配式试件进行了数值分析,通过有限元分析得出现浇试件的骨架曲线与试验实测的骨架曲线比较符合,即可以用有限元分析方法对装配式试件进行分析。在有限元分析中不考虑装配式试件中新老混凝土结合面的特殊情况,得出装配式试件的承载力高于现浇试件的承载力,那么在试验中,如果对装配式试件中的新老混凝土结合面做较好的处理的话,装配式试件的承载力也可能会高于现浇试件。
[Abstract]:With the continuous development of housing industrialization in our country, the prefabricated structure will become the main body of the future building development. The fabricated frame shear wall structure, which has the advantages of both the fabricated frame structure and the assembled shear wall structure, will have a broad application prospect. As a form of fabricated frame-shear wall structure, prefabricated frame-core tube structure will also be widely used in the future high-rise housing construction. So it is very important to study the seismic behavior of the connection joints between the components of the assembled frame-tube structure. At present, prefabricated structures are designed according to cast-in-place structures and combined by splitting, and the overall performance and seismic performance of assembly structures are determined by the performance of the connections between their components. However, it has not been proved whether the performance of the connection between the components can reach the same as that of the cast-in-place structure, so it is important to study the connection performance between the assembly components to promote the development of the assembly structure. In this paper, two specimens of shear wall and in-plane connection point of assembled beam are made by two methods, and a cast-in-place joint is made as a comparison, and three specimens are subjected to low-cycle reciprocating loading test. The crack development, failure characteristics, cracking load, yield load, ultimate load, load-displacement hysteretic curve, skeleton curve, stiffness degradation curve, etc. The bearing capacity, ductility, stiffness and energy dissipation capacity of prefabricated specimens and cast-in-place specimens are analyzed. Through the analysis of the test results, it is concluded that the cracking, yielding and failure process of the assembled specimens are basically the same as the cast-in-place specimens, and the bending failure occurs at the root of the beam, and the bearing capacity of the assembled specimens is also analyzed. The bearing capacity of each stage of the assembled specimen is slightly smaller than that of the cast-in-place specimen, while the bearing capacity of the two assembled specimens is similar in each stage. By observing the stiffness degradation curve of each specimen, it is concluded that the change trend of the stiffness degradation curve of the assembled specimen is the same as that of the cast-in-place specimen, but the stiffness is slightly smaller than that of the cast-in-place specimen, and the stiffness degradation of the two assembled specimens is basically the same during the loading process. In terms of ductility, the ductility coefficient of the assembled specimen is smaller than that of the cast-in-place specimen, but the difference is not more than 11.The ductility of the assembled specimen is close to that of the cast-in-place specimen, and the displacement ductility coefficient of the two fabricated specimens is basically the same, which indicates that the ductility is equal. In terms of energy dissipation capacity, the energy dissipation capacity of assembled specimens connected by cast-in-place tape is stronger than that of cast-in-place specimens, while that of fabricated specimens connected by high-strength mortar grouting joints is similar to that of cast-in-place specimens. In this paper, the finite element analysis software Abaqus is also used to analyze the cast-in-place specimen and an assembled specimen. It is found that the skeleton curve of the cast-in-place specimen is in good agreement with the measured skeleton curve by the finite element analysis. The method of finite element analysis can be used to analyze the assembled specimen. In the finite element analysis, the special situation of the new and old concrete joints in the assembled specimens is not considered, and it is concluded that the bearing capacity of the assembled specimens is higher than that of the cast-in-place specimens. If the new and old concrete joints in the assembled specimens are better treated, the bearing capacity of the assembled specimens may also be higher than that of the cast-in-place specimens.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.11

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